What is scale factor?
the reciprocal of a fraction
o
two ratios that are equal to each other
o
a comparison of two numerical values
o
a combination of simir numerical values
o
congruent sides of two polygons
how many times larger or smaller a figure is than another figure
the product of cross multiplication

Apinhole camera is made out of a light-tight box with a piece of film attached to one side and pinhole on the opposite side. the optimum diameter d(in millimeters) of the pinhole can be modeled by d=1.9[ (5.5 x 10^-4) l) ] ^1/2, where l is the length of the camera box (in millimeters). what is the optimum diameter for a pinhole camera if the camera box has a length of 10 centimeters